Hose Clamps on Spitzer SF/SK Silo Trailers
Every hose-to-fitting connection on an aluminium Spitzer SF or SK silo trailer depends on a secure, airtight clamp. The clamps and split clamps securing the transfer or compressor hose to the Storz suction couplings operate under pressure and constant vibration; the right choice and condition of each clamping element directly affects the airtightness of the pneumatic circuit. An incorrectly selected or corroded clamp is one of the most common causes of air blow-by and dusting during discharge.
Our range covers three core groups of fastening components: GBS-type hose clamps for industrial and compressor hose assembly, split clamps for smooth suction couplings designed for split-clamp fitting, and worm-drive and double-bolt clamps for industrial and automotive connections. A Spitzer SF/SK service technician can therefore source the complete assembly — hose, suction coupling, and fastening element — all correctly matched in size and material.
The standard hose size on Spitzer silo trailers is DN75, for which we maintain permanent stock of GBS clamps and split clamps in size 75x10. The standard GBS specification is fully galvanised steel (W1) with a hexagonal bolt class 8.8, conforming to DIN 3017. Where operating conditions or the material being conveyed require greater corrosion resistance, we supply stainless and acid-resistant clamps (W2, W4) and stainless split clamps.
Specifications and Materials
GBS Hose Clamps
| Parameter | Value |
|---|---|
| Standard material | fully galvanised steel (W1) |
| Bolt | hexagonal, class 8.8 |
| Band width | 18 mm |
| Standard | DIN 3017 |
| Sizes | from 17 mm |
| Additional grades | stainless and acid-resistant steel (W2, W4) |
Split Clamps
| Parameter | Value |
|---|---|
| Set contents (per coupling) | 2 x split clamp, 4 mounting bolts, 4 nuts |
| Standard material | German-grade aluminium |
| Standard | DIN 2817, DIN 2826 |
| Application | smooth suction couplings for split-clamp fitting |
| Size for DN75 hose | 75x10 (permanent stock) |
| Additional grades | aluminium and stainless steel, incl. 75x8 |
Worm-Drive and Double-Bolt Clamps
Full range of worm-drive and double-bolt (double-sided) clamps for assembly of every type of industrial and automotive hose.
Sizes and Types
GBS clamps are available in sizes from 17 mm to 130 mm, in standard W1 specification as well as stainless and acid-resistant grades (W2, W4). The correct GBS clamp size is determined by the outside diameter of the hose pushed onto the Storz suction coupling spigot. The table below shows typical hose diameters and the corresponding Storz coupling sizes for GBS clamp assembly:
| Storz Coupling Size | Hose Diameter | Seal |
|---|---|---|
| C (52) | 50 mm | black NBR |
| B (75) | 75 mm | black NBR |
| A (110) | 100 mm | black NBR |
| A (110) | 110 mm | black NBR |
Split clamps are held in permanent stock in size 75x10 for DN75 hose; all other sizes and forms (aluminium, stainless steel, incl. 75x8) are supplied on direct delivery for any hose type.
Compatibility with Spitzer Silo Trailers (SF/SK)
GBS clamps and split clamps are matched to the hose diameter and type of Storz suction coupling fitted to Spitzer SF and SK silo trailers. For the standard DN75 hose, size 75x10 is a standing stock item — it fits smooth suction couplings for split-clamp assembly per DIN 2817. Suction couplings designed for GBS clamp fitting are secured with GBS clamps sized to the outside diameter of the hose with the coupling in place.
The choice of steel grade (W1 galvanised vs W2/W4 stainless) is governed by the working environment: W1 is adequate for typical dry bulk loads; stainless and acid-resistant steel is specified for corrosive conditions or contact with aggressive substances.
Common Faults on Spitzer Silo Trailers
In day-to-day service work, the most frequent cause of leaks at hose-to-coupling joints is an under-torqued or corroded GBS clamp — evident as air blow-by and dusting under pressure. Galvanised W1 clamps in harsh environments corrode over time; upgrading to W2/W4 stainless is the recommended remedy.
With split clamp connections, typical problems are uneven bolt torque or bolt corrosion, leading to leaks and the risk of the hose working loose. At every hose change, inspect the full set of 2 split clamps + 4 bolts + 4 nuts and replace any components showing signs of corrosion. Worm-drive clamps with fatigue in the band or worm mechanism should be replaced as a preventive measure.
Availability and Delivery
Standard W1 GBS clamps and 75x10 split clamps for DN75 hose are held in stock at PHS Magnum’s warehouse in Chorula near Opole. Stainless and acid-resistant grades (W2, W4), other split clamp sizes, and worm-drive clamps are supplied on direct next-day delivery.
- Poland — courier delivery
- DACH — delivery to Germany, Austria, and Czech Republic
- Collection — warehouse in Chorula near Opole, 4 km from the A4 motorway
For help selecting clamps and split clamps for a specific hose and coupling, contact the Spitzer service team on +48 602 716 551. Full range of services: magnumchorula.pl/en/service/.
Related Categories
- Hose Clamps (Opaski Zaciskowe) — GBS and split clamps for pneumatic hose connections on Spitzer SF/SK
- Hose Compartment Covers (Blanking Caps) — DN160/DN200 covers for one, two or three pipes
- Compartment Keys & Locks — butterfly, 8 mm square and spike-type locks for hose compartment closure
- Mallets and Storz Wrenches — rubber mallets and dedicated Storz spanners for on-site coupling and uncoupling
- Storz System — Storz suction couplings fitted to the hose
- Spitzer Spare Parts Catalogue — full overview of all categories
See also: This category in the full PHS Magnum network catalogue (all brands) →
Author: Aleksy Pasternak — Managing Partner PHS Magnum, 20 years in the industry, internal ISO 9001:2015 auditor (DEKRA).
